Storage limits for Cloud Volumes ONTAP 9.5 Edit on GitHub Request doc changes

Cloud Volumes ONTAP has storage configuration limits to provide reliable operations. For best performance, do not configure your system at the maximum values.

The following sections list limits for aggregates, volumes, LUNs, and related storage objects. Note that the maximum capacity is model specific. Cloud Volumes ONTAP configurations that support a lower capacity limit cannot reach some of the size and disk limits.

System capacity limit

A system’s capacity limit depends on the Cloud Volumes ONTAP license that you choose for the system:

License Capacity limit

Explore

2 TB

Standard

10 TB

Premium

Azure: 252 TB for single node, 368 TB for an HA pair

BYOL

Notes:

  1. The capacity limit may be less in Azure because of virtual machine disk limits:

    • DS3: 60 TB for single node

    • DS4 and DS13: 124 TB for single node and 248 TB for HA pairs

  2. If you enable data tiering, a system’s capacity limit stays the same. The capacity limit includes both disks and object storage.

Aggregate and disk limits for Cloud Volumes ONTAP in Azure

Physical storage Parameter Limit

Aggregates and disks

Maximum number of aggregates

63

Maximum aggregate size

48 TB of raw capacity for single node 1, 2
96 TB of raw capacity for HA pairs 1, 2

Minimum number of disks per aggregate

1

Maximum number of disks per aggregate

12

Maximum disk size

4 TB for single node
8 TB for HA pairs

Maximum number of data disks across all aggregates in a node 3

  • 15 for DS3_v2

  • 31 for DS4_v2 and DS13_v2

  • 63 for DS5_v2 and DS14_v2

RAID groups

Maximum per aggregate

1

Notes:

  1. The maximum usable capacity of a 48 TB aggregate is 42.52 TB, while the maximum usable capacity of a 96 TB aggregate is 85.05 TB.

  2. The aggregate capacity limit is based on the disks that comprise the aggregate. The limit does not include object storage used for data tiering.

  3. The data disk limit is specific to disks that contain user data. The boot disk and root disk for each node are not included in this limit.

Logical storage limits

Logical storage Parameter Limit

Storage virtual machines (SVMs)

Maximum per node

One data-serving SVM and one or more SVMs used for disaster recovery 1

Files

Maximum size

Volume size dependent

Maximum per volume

Volume size dependent, up to 2 billion

FlexClone volumes

Hierarchical clone depth 2

499

FlexVol volumes

Maximum per node

500

Minimum size

20 MB

Maximum size

76.55 TB of fully provisioned capacity 3

Qtrees

Maximum per FlexVol volume

4,995

Snapshot copies

Maximum per FlexVol volume

1,023

Notes:

  1. Cloud Manager does not provide any setup or orchestration support for SVM disaster recovery. It also does not support storage-related tasks on any additional SVMs. You must use System Manager or the CLI for SVM disaster recovery.

  2. Hierarchical clone depth is the maximum depth of a nested hierarchy of FlexClone volumes that can be created from a single FlexVol volume.

  3. The specified limit is based on the assumption that you use Cloud Manager to create a volume and that you keep the aggregate free space ratio at 10 percent, which Cloud Manager sets by default.

iSCSI storage limits

iSCSI storage Parameter Limit

LUNs

Maximum per node

1,024

Maximum number of LUN maps

1,024

Maximum size

16 TB

Maximum per volume

512

igroups

Maximum per node

256

Initiators

Maximum per node

512

Maximum per igroup

128

iSCSI sessions

Maximum per node

1,024

LIFs

Maximum per port

32

Maximum per portset

32

Portsets

Maximum per node

256